Disk array system and failure recovering control method

Inactive Publication Date: 2007-05-22
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0021]The object of the invention is to provide a disk array system and a failure recovering cont

Problems solved by technology

As a result, the packaging density of drive boards on the mother board is deteriorated.
It can be said that the disk array system proposed in the patent document 1 has hardware configuration suitable for miniaturizing body size and increasing memory capacity, however, when a data read request is issued from the host syste

Method used

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  • Disk array system and failure recovering control method
  • Disk array system and failure recovering control method
  • Disk array system and failure recovering control method

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Embodiment Construction

[0052]Referring to the drawings, embodiments of the invention will be described below.

[0053]FIG. 1 shows an embodiment of a disk array system to which the invention is applied.

[0054]The disk array system shown in FIG. 1 has redundant configuration that two disk controllers 1A, 1B access a disk array 5 composed of a plurality of disk drives. These disk controllers 1A, 1B are connected to a service processor (SVP) 2 provided with a display apparatus 9. The disk controller 1A is composed of a channel adapter 10 connected to CPU (not shown) as a host system via a plurality of channel paths 3A (30A to 33A), a disk adapter (DKA) 20 connected to the disk array 5 via a plurality of disk channels 4A (40A to 43A) including a signal line for bypass control described later and an interconnection network 40 mutually connecting these components.

[0055]In this embodiment, description will be made on the premise that the number of disk drives forming each logical group (hereinafter called a RAID gro...

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Abstract

In a disk array system composed of a disk controller connected to a host system and a maintenance terminal and a disk array connected to the disk controller via a disk channel, when failure occurs in a drive in the disk array, the disk controller writes data stored in a plurality of disk drives on a faulty board on which a faulty drive is mounted into substitution disk drives and informs the maintenance terminal that the faulty board is replaceable after the reorganization of logical groups is completed.

Description

BACKGROUND OF THE INVENTION[0001](1) Field of the Invention[0002]The present invention relates to a disk array system and a failure recovering control method, further detailedly relates to a disk array system of a redundant array of inexpensive disks (RAID) type which forms one logical group by a plurality of disk drives including a redundant disk drive to prepare for the failure of any disk drive and a failure recovering control method.[0003](2) Description of the Related Art[0004]A high-performance computer system is provided with a secondary mass storage and reads and writes data required by a host system such as CPU from and to the secondary storage at any time. For the secondary storage, for example, a disk unit having a nonvolatile storage medium that enables random access such as a magnetic disk and an optical disk is general and recently, a disk array system composed of multiple small-sized disk drives (hereinafter called merely drives) to increase storage capacity is mainst...

Claims

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Application Information

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IPC IPC(8): G06F11/00H02H3/05G06F3/06
CPCG06F11/1092
Inventor TANAKA, KATSUYAUEMURA, TETSUYA
Owner HITACHI LTD
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